May I ask how far you away you would typically take a picture like this? I'm always a bit uneasy taking photos in public. I always get the "who's the creepy guy?" look.

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i shoot from an extreme distance i.e. 100+ feet. i shoot a d70 in RAW coupled with a nikkor 300mm lens which allows for tight cropping in ps. i never infringe on their space. as far as shooting people, i generally dont...im branching out a bit from my norm. these http://www.thephotoforum.com/forum/showthread.php?t=16994 were shot from a proper distance as well.